ex·cre·tion /ɪkˈskriʃən/
  排泄,排泄物
  ex·cre·tion /ɪkˈskrɪʃən/ 名詞
  排泄,排泄物,分泌物
  Ex·cre·tion n.
  1. The act of excreting.
     To promote secretion and excretion.   --Pereira.
  2. That which is excreted; excrement.
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  excretion
       n 1: the bodily process of discharging waste matter [syn: elimination,
             evacuation, excreting, voiding]
       2: waste matter (as urine or sweat but especially feces)
          discharged from the body [syn: body waste, excreta, excrement,
           excretory product]